A cushion includes interconnected walls that define an array of buckling columns. Each buckling column of the array of buckling columns includes a plurality of buckling points at different elevations along a height of the buckling column. The buckling points buckle under different loads. Methods of designing cushions with a plurality of buckling points are also disclosed.

The present disclosure provides a spring cushion used for furniture, the spring cushion comprises an outer layer having compartments and a plurality of spring modules as well as sponge blocks arranged within the compartments, and the spring cushion further comprises a base cloth having a plurality of openings, each opening of the base cloth being aligned with one or more compartments in a plurality of the compartments, and each opening is provided with a curtain and a zipper provided on the curtain for opening and closing each opening.